CN102456463B - A kind of method preparing multipole orientation annular magnetic and the device of enforcement the method - Google Patents
A kind of method preparing multipole orientation annular magnetic and the device of enforcement the method Download PDFInfo
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Abstract
The invention provides a kind of method preparing multipole orientation annular magnetic, the method includes: magnetic powder is filled in groove between the core rod of mould and former, and two magnetic conductive device are set outside die sleeve, the angle between two magnetic conductive device is equal to the angle of a pair magnetic pole in multipole orientation annular magnetic；Outer magnetic pole outer magnetic pole formula alignment magnetic field is used magnetic powder to be magnetized and is orientated；By this alignment magnetic field of step motor control or equipped with the mold rotation angle, θ of magnetic powder, angle, θ, equal to the angle of a pair magnetic pole in multipole orientation annular magnetic, then uses this alignment magnetic field magnetize magnetic powder and be orientated；Continue to rotate this alignment magnetic field or mould in the manner described above, and use this alignment magnetic field magnetic powder is magnetized and is orientated, until completing magnetization and the orientation of 360 degree；Compressing.Present invention also offers the device implementing this preparation method.The preparation method efficiency of the present invention is high, low cost.
Description
Technical field
The present invention relates to a kind of method preparing multipole orientation annular magnetic, the invention still further relates to
For using the rotating field of this preparation method to prepare the structure of multipole oriented ring.
Background technology
The sintered multipolar ring that magnetizes is with a wide range of applications at machine field.Prepare sintering at present
Multipole magnetization ring mainly has following two method.One is by prepared by top magnetic field orientating method edge
The annular magnetic of radial radiation orientation, then obtains multipole by internal-and external diameter multipole magnetization and fills
Magnet ring (as shown in Figure 1), magnet ring internal magnetization intensity arranges along radial direction.By this
The table magnetic of the multipole magnetization ring that mode obtains is relatively low.And make to prepare in this way magnet ring
During the less radially oriented ring of internal diameter, alignment magnetic field is substantially reduced, thus causes magnetic powder to take
To not exclusively, and the strength reduction of not only alignment magnetic field, Er Qiejun when magnet ring height is higher
Even property is deteriorated, thus causes the magnetic property of multipole magnetization ring and concordance to degenerate.
Another kind of method is to prepare multistage filling by an oriented coils and a magnetizing coil
Magnet ring.Using according to magnet ring inside/outside footpath and the difference of number of poles, oriented coils is by the magnetic in magnet ring
Powder is according to the magnetic line of force direction arrangement designed, such that it is able to reach optimal magnetic characteristic, then
The magnetizing coil arranged with the similar magnetic line of force magnetizes and obtains multipole magnetization ring (as shown in Figure 2).
Multipole oriental magnetic ring is for radially oriented magnetic ring, and its table magnetic generally wants high 30%-50%,
The distributed wave in 360 degree of directions is also more uniformly distributed.Therefore the development of multipole oriental magnetic ring and application
Also will be more wide.The most this preparation method needs the supporting correspondence of coil when being orientated and magnetizing
Use.Even if in the case of preparing the multipole magnetization ring of same size, the requirement of different numbers of poles
It is also required for different orientations and magnetizing coil.Which results in inefficiency, cost increases.
The application of Application No. 200710106670.1 provides the most radially oriented ring of one
Preparation method.Owing to its orientation field or mould are all to rotate continuously, therefore can not prepare
Go out multipole oriental magnetic ring.
Summary of the invention
It is an object of the present invention to provide a kind of side preparing multipole orientation annular magnetic
Method, described method comprises the steps:
(1) magnetic powder is filled in groove between the core rod of mould and former, and at die sleeve peripheral hardware
Putting two magnetic conductive device, the angle between said two magnetic conductive device is equal to described multipole orientation circle
The angle of a pair magnetic pole in annular magnet；
(2) outer magnetic pole-outer magnetic pole formula orientation magnetic produced by said two magnetic conductive device is used
Described magnetic powder is orientated by field；
(3) by outer magnetic pole-outer magnetic pole formula alignment magnetic field or dress described in step motor control
Having the mold rotation angle, θ of described magnetic powder, described angle, θ is circular equal to described multipole orientation
The angle of a pair magnetic pole in magnet, then uses described outer magnetic pole-outer magnetic pole formula alignment magnetic field pair
Described magnetic powder is orientated；
(4) continue to rotate described outer magnetic pole-outer magnetic pole formula according to the mode of step (3) to be orientated
Magnetic field or described mould, and use described outer magnetic pole-outer magnetic pole formula alignment magnetic field to described magnetic
Powder is orientated, until completing the orientation of 360 degree.
After described method has also included the magnetization to described magnetic powder and orientation, described magnetic powder is entered
Row compacting, obtains multipole orientation annular magnetic.
Preferably, described core rod is prepared from by permeability magnetic material；Described former and die sleeve are led by non-
Magnetic material is prepared from.
Preferably, described outer magnetic pole-outer magnetic pole formula alignment magnetic field is stationary magnetic field or rule change
The pulsed magnetic field changed.
Preferably, described multipole orientation annular magnetic include 4 poles, 8 poles, 16 poles, 24
Pole orientation annular magnetic.
Preferably, described multipole orientation annular magnetic is 8 pole orientation annular magnetics, described
Angle between two magnetic conductive device is 45 degree.
A kind of rotating field using above-mentioned preparation method of offer is provided
The device of preparation multipole oriented ring, described device includes mould, two magnetic conductive device and stepping electricity
Machine, wherein: described mould includes that core rod, former and die sleeve, described former suit are arranged on institute
Stating outside core rod, to form the groove placing magnetic powder, described die sleeve suit is arranged on outside described former,
And described die sleeve closely cooperates with described former；Said two magnetic conductive device is arranged on described die sleeve
Outward, the angle and between said two magnetic conductive device is equal in multipole orientation annular magnetic a pair
The angle of magnetic pole, described motor is connected with said two magnetic conductive device or described mould.
Preferably, described core rod is prepared from by permeability magnetic material；Described former and die sleeve are led by non-
Magnetic material is prepared from.Described core rod, former and die sleeve are for being arranged concentrically.
Additionally, described device also includes that chuck, described chuck are fixed on the outer radius of described die sleeve.
It is many that the preparation method using the present invention can prepare 4 poles, 8 poles, 16 poles, 24 poles etc.
Plant multipole orientation annular magnetic.In the preparation process in accordance with the present invention, between two magnetic conductive device
Angle and the number of revolutions of alignment magnetic field or mould be orientated annular magnetic according to multipole
Number of poles determine.Such as, for the multipole orientation annular magnetic that number of poles is the ends of the earth,
Angle between two magnetic conductive device is 45 degree, it is only necessary to by step motor control alignment magnetic field
Or mold rotation seven times, every time rotation 45 degree, can complete the orientation process of magnetic powder.?
Afterwards magnetic powder is suppressed (the most two-way compacting), obtains multipole orientation annular magnetic.
The rotating field using above-mentioned preparation method in the present invention prepares the structure of multipole oriented ring
In, core rod is prepared from by permeability magnetic material, and this permeability magnetic material can be pure iron, ferrocobalt etc.
Any one permeability magnetic material；Former and die sleeve are prepared from by non-magnet material, this non-magnetic material
Material can be hard alloy, nonmagnetic steel (such as 1Cr18Ni9Ti, 9Mn9) etc. any one
Non-magnet material.
The orientation magnetic that the method for preparation multipole provided by the present invention orientation annular magnetic uses
The angle of field is the angle of a pair magnetic pole in this multipole orientation annular magnetic, the most only accounts for this many
The very fraction of pole orientation annular magnetic 360 degree.In the case of mould determines, Ke Yigen
According to the angle of two magnetic conductive device and by step motor control number of revolutions, regulate multipole
The number of poles of orientation annular magnetic, without again making orientation magnetizing coil.Therefore this
Production efficiency both can be improved by the method for bright offer, has saved again production cost.
Compared with the preparation method of existing multipole orientation annular magnetic, the method for the present invention is only
Need the reading one_to_one corresponding on chuck, it is possible to the magnetic pole during completing orientation and magnetizing
One_to_one corresponding, without making marks on magnet ring, the most loaded down with trivial details go corresponding orientation and magnetizes
During magnetic pole.
Simultaneously as the method for the present invention use all the time same magnetic field as alignment magnetic field, therefore
It is effectively guaranteed the degree of orientation of the multipole orientation different magnetic poles of annular magnetic, different angles
Concordance.Therefore, the method for the present invention solves well and is orientated circular magnetic in multipole at present
The Distribution of Magnetic Field generally existed in the preparation process of body is uneven, magnetic powder is orientated inconsistent asking
Topic, thus overcome multipole orientation annular magnetic in sintering process, be prone to cracking, magnetic property
The defect that concordance is poor.And, compared with prior art, the application of the invention is provided
Preparation method, multipole can be orientated annular magnetic table magnetic improve 10～15%.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that magnetizes of the radially oriented ring of prior art；
Fig. 2 is the schematic diagram that magnetizes of prior art multipole oriented ring；
Fig. 3 is that the rotating field of the present invention prepares multipole oriented ring structural representation.
Description of reference numerals is as follows:
Magnetic conductive device 1, die sleeve 2, former 3, magnetic powder 4, core rod 5.
Detailed description of the invention
In order to further appreciate that the structure of the present invention, feature and other purposes, in conjunction with institute
Attached preferred embodiment describes in detail as follows, and illustrated preferred embodiment is merely to illustrate the present invention
Technical scheme, and the non-limiting present invention
For the ease of comparing, each embodiment of the present invention all uses identical magnetic powder (magnetic
The composition of powder is (percentage by weight): more than 27.5Nd-2.5Dy-0.25Cu-1.0B-0.9Co-Fe)
Prepare multipole orientation annular magnetic, but the preparation multipole of the present invention is orientated annular magnetic
Method and implement the method device do not limited by magnetic powder composition.
Embodiment 1
Prepare the multipole orientation annular magnetic that number of poles is 8 poles: magnetic powder 4 is filled in mould
Groove between core rod 5 and former 3, and two magnetic conductive device 1 are set outside die sleeve 2, these are two years old
Angle between individual magnetic conductive device 1 is 45 degree, uses outer magnetic pole-outer magnetic pole formula alignment magnetic field
(this outer magnetic pole-outer magnetic pole formula alignment magnetic field is to be produced by described the two magnetic conductive device 1
, following example are identical with this) magnetic powder 4 is orientated.Then by motor control
Outer magnetic pole processed-outer magnetic pole formula alignment magnetic field or mold rotation 45 degree, then use outer magnetic pole-
Described magnetic powder 4 is orientated by outer magnetic pole formula alignment magnetic field.It is rotated further in a manner mentioned above
Outer magnetic pole-outer magnetic pole formula alignment magnetic field or mould, and use this outer magnetic pole-outer magnetic pole formula to take
To magnetic field, magnetic powder 4 being orientated, until completing the orientation of 360 degree, being then pressed into type.
The external diameter of obtained multipole orientation annular magnetic is 130mm, and height is 40mm.
RMT-303 type table generator is used to measure this embodiment and traditional method system respectively
The table magnetic circumferentially and axially the gone up distribution of standby multipole orientation annular magnetic.Wherein, circle
The computational methods of the table magnetic uniformity of circumferential direction are as follows:
The table magnetic uniformity of circumferencial direction=(N pole or peak maximum-N pole, S pole or S
Pole peak value minima)/N pole or S pole peak average value.Wherein, N pole or S pole peak value are
Refer to N pole or the maximum of S pole table magnetic, the most available by table generator.For example,
For the multipole orientation annular magnetic that number of poles is 8 poles, this magnet has 4 N pole peak values
With 4 S pole peak values, from these 4 N pole peak values, select maximum and minima the most again,
Respectively as N pole peak maximum and N pole peak value minima；And from this peak, 4 S pole
Value is selected maximum and minima, minimum respectively as S pole peak maximum and S pole peak value
Value, finally calculates with above-mentioned formula and characterizes table magnetic uniformity.
The computational methods of axial table magnetic uniformity are as follows:
Axial table magnetic uniformity=(table of the table magnetic maximum-short transverse of short transverse
Magnetic minima) the table magnetic recording level average of/short transverse.
Following example all use said method.Measurement result is shown in Table 1.
Table 1
Embodiment 2
Prepare the multipole orientation annular magnetic that number of poles is 8 poles: magnetic powder 4 is filled in mould
Groove between core rod 5 and former 3, and two magnetic conductive device 1 are set outside die sleeve 2, these are two years old
Angle between individual magnetic conductive device 1 is 45 degree, uses outer magnetic pole-outer magnetic pole formula alignment magnetic field
Magnetic powder 4 is orientated.Then by step motor control outer magnetic pole-outer magnetic pole formula orientation magnetic
Field or mold rotation 45 degree, then use outer magnetic pole-outer magnetic pole formula alignment magnetic field to described magnetic
Powder 4 is orientated.It is rotated further outer magnetic pole-outer magnetic pole formula alignment magnetic field in a manner mentioned above
Or mould, and use this outer magnetic pole-outer magnetic pole formula alignment magnetic field that magnetic powder 4 is orientated,
Until completing the orientation of 360 degree, it is then pressed into type.Obtained multipole is orientated circular magnetic
The external diameter of body is 130mm, and height is 10mm.
RMT-303 type table generator is used to measure this embodiment and traditional method system respectively
The table magnetic circumferentially and axially the gone up distribution of standby multipole orientation annular magnetic.Measurement result
It is shown in Table 2.
Table 2
Embodiment 3
Prepare the multipole orientation annular magnetic that number of poles is 8 poles: magnetic powder 4 is filled in mould
Groove between core rod 5 and former 3, and two magnetic conductive device 1 are set outside die sleeve 2, these are two years old
Angle between individual magnetic conductive device 1 is 45 degree, uses outer magnetic pole-outer magnetic pole formula alignment magnetic field
(this outer magnetic pole-outer magnetic pole formula alignment magnetic field is to be produced by described the two magnetic conductive device 1
, following example are identical with this) magnetic powder 4 is orientated.Then by motor control
Outer magnetic pole processed-outer magnetic pole formula alignment magnetic field or mold rotation 45 degree, then use outer magnetic pole-
Described magnetic powder 4 is orientated by outer magnetic pole formula alignment magnetic field.It is rotated further in a manner mentioned above
Outer magnetic pole-outer magnetic pole formula alignment magnetic field or mould, and use this outer magnetic pole-outer magnetic pole formula to take
To magnetic field, magnetic powder 4 being orientated, until completing the orientation of 360 degree, being then pressed into type.
The external diameter of obtained multipole orientation annular magnetic is 15mm, and height is 24mm.
RMT-303 type table generator is used to measure this embodiment and traditional method system respectively
The table magnetic circumferentially and axially the gone up distribution of standby multipole orientation annular magnetic.Measurement result
It is shown in Table 3.
Table 3
Embodiment 4
Prepare the multipole orientation annular magnetic that number of poles is 8 poles: magnetic powder 4 is filled in mould
Groove between core rod 5 and former 3, and two magnetic conductive device 1 are set outside die sleeve 2, these are two years old
Angle between individual magnetic conductive device 1 is 45 degree, uses outer magnetic pole-outer magnetic pole formula alignment magnetic field
(this outer magnetic pole-outer magnetic pole formula alignment magnetic field is to be produced by described the two magnetic conductive device 1
, following example are identical with this) magnetic powder 4 is orientated.Then by motor control
Outer magnetic pole processed-outer magnetic pole formula alignment magnetic field or mold rotation 45 degree, then use outer magnetic pole-
Described magnetic powder 4 is orientated by outer magnetic pole formula alignment magnetic field.It is rotated further in a manner mentioned above
Outer magnetic pole-outer magnetic pole formula alignment magnetic field or mould, and use this outer magnetic pole-outer magnetic pole formula to take
To magnetic field, magnetic powder 4 being orientated, until completing the orientation of 360 degree, being then pressed into type.
The external diameter of obtained multipole orientation annular magnetic is 15mm, and height is 3mm.
RMT-303 type table generator is used to measure this embodiment and traditional method system respectively
The table magnetic circumferentially and axially the gone up distribution of standby multipole orientation annular magnetic.Measurement result
It is shown in Table 4.
Table 4
Embodiment 5
Prepare the multipole orientation annular magnetic that number of poles is 4 poles: magnetic powder 4 is filled in mould
Groove between core rod 5 and former 3, and two magnetic conductive device 1 are set outside die sleeve 2, these are two years old
Angle between individual magnetic conductive device 1 is 90 degree, uses outer magnetic pole-outer magnetic pole formula alignment magnetic field
(this outer magnetic pole-outer magnetic pole formula alignment magnetic field is to be produced by described the two magnetic conductive device 1
, following example are identical with this) magnetic powder 4 is orientated.Then by motor control
Outer magnetic pole processed-outer magnetic pole formula alignment magnetic field or mold rotation 90 degree, then use outer magnetic pole-
Described magnetic powder 4 is orientated by outer magnetic pole formula alignment magnetic field.It is rotated further in a manner mentioned above
Outer magnetic pole-outer magnetic pole formula alignment magnetic field or mould, and use this outer magnetic pole-outer magnetic pole formula to take
To magnetic field, magnetic powder 4 being orientated, until completing the orientation of 360 degree, being then pressed into type.
The external diameter of obtained multipole orientation annular magnetic is 24mm, and height is 12mm.
RMT-303 type table generator is used to measure this embodiment and traditional method system respectively
The table magnetic circumferentially and axially the gone up distribution of standby multipole orientation annular magnetic.Measurement result
It is listed in Table 5 below.
Table 5
Embodiment 6
Prepare the multipole orientation annular magnetic that number of poles is 12 poles: magnetic powder 4 is filled in mould
Core rod 5 and former 3 between groove, and two magnetic conductive device 1 are set outside die sleeve 2, this
Angle between two magnetic conductive device 1 is 30 degree, uses outer magnetic pole-outer magnetic pole formula orientation magnetic
(this outer magnetic pole-outer magnetic pole formula alignment magnetic field is to be produced by described the two magnetic conductive device 1 in field
, following example are identical with this) magnetic powder 4 is orientated.Then by motor control
Outer magnetic pole processed-outer magnetic pole formula alignment magnetic field or mold rotation 30 degree, then use outer magnetic pole-
Described magnetic powder 4 is orientated by outer magnetic pole formula alignment magnetic field.It is rotated further in a manner mentioned above
Outer magnetic pole-outer magnetic pole formula alignment magnetic field or mould, and use this outer magnetic pole-outer magnetic pole formula to take
To magnetic field, magnetic powder 4 being orientated, until completing the orientation of 360 degree, being then pressed into type.
The external diameter of obtained multipole orientation annular magnetic is 36mm, and height is 15mm.
RMT-303 type table generator is used to measure this embodiment and traditional method system respectively
The table magnetic circumferentially and axially the gone up distribution of standby multipole orientation annular magnetic.Measurement result
It is shown in Table 6.
Table 6
Embodiment 7
Prepare the multipole orientation annular magnetic that number of poles is 24 poles: magnetic powder 4 is filled in mould
Core rod 5 and former 3 between groove, and two magnetic conductive device 1 are set outside die sleeve 2, this
Angle between two magnetic conductive device 1 is 15 degree, uses outer magnetic pole-outer magnetic pole formula orientation magnetic
(this outer magnetic pole-outer magnetic pole formula alignment magnetic field is to be produced by described the two magnetic conductive device 1 in field
, following example are identical with this) magnetic powder 4 is orientated.Then by motor control
Outer magnetic pole processed-outer magnetic pole formula alignment magnetic field or mold rotation 15 degree, then use outer magnetic pole-
Described magnetic powder 4 is orientated by outer magnetic pole formula alignment magnetic field.It is rotated further in a manner mentioned above
Outer magnetic pole-outer magnetic pole formula alignment magnetic field or mould, and use this outer magnetic pole-outer magnetic pole formula to take
To magnetic field, magnetic powder 4 being orientated, until completing the orientation of 360 degree, being then pressed into type.
The external diameter of obtained multipole orientation annular magnetic is 48mm, and height is 16mm.
RMT-303 type table generator is used to measure this embodiment and traditional method system respectively
The table magnetic circumferentially and axially the gone up distribution of standby multipole orientation annular magnetic.Measurement result
It is listed in Table 7 below.
Table 7
Embodiment 8
Prepare the multipole orientation annular magnetic that number of poles is 36 poles: magnetic powder 4 is filled in mould
Core rod 5 and former 3 between groove, and two magnetic conductive device 1 are set outside die sleeve 2, this
Angle between two magnetic conductive device 1 is 10 degree, uses outer magnetic pole-outer magnetic pole formula orientation magnetic
(this outer magnetic pole-outer magnetic pole formula alignment magnetic field is to be produced by described the two magnetic conductive device 1 in field
, following example are identical with this) magnetic powder 4 is orientated.Then by motor control
Outer magnetic pole processed-outer magnetic pole formula alignment magnetic field or mold rotation 10 degree, then use outer magnetic pole-
Described magnetic powder 4 is orientated by outer magnetic pole formula alignment magnetic field.It is rotated further in a manner mentioned above
Outer magnetic pole-outer magnetic pole formula alignment magnetic field or mould, and use this outer magnetic pole-outer magnetic pole formula to take
To magnetic field, magnetic powder 4 being orientated, until completing the orientation of 360 degree, being then pressed into type.
The external diameter of obtained multipole orientation annular magnetic is 48mm, and height is 16mm.
RMT-303 type table generator is used to measure this embodiment and traditional method system respectively
The table magnetic circumferentially and axially the gone up distribution of standby multipole orientation annular magnetic.Measurement result
It is shown in Table 8.
Table 8
It is to be understood that, foregoing invention content and detailed description of the invention are intended to prove institute of the present invention
The actual application of technical scheme is provided, should not be construed as limiting the scope of the present invention.This
Skilled person in spirit and principles of the present invention, when can various modifications may be made, equivalent,
Or improve.Protection scope of the present invention is as the criterion with appended claims.
Claims (8)
1. the method preparing multipole orientation annular magnetic, described method comprises the steps:
(1) magnetic powder being filled in groove between the core rod of mould and former, and arrange two magnetic conductive device outside die sleeve, the angle between said two magnetic conductive device is equal to the angle of a pair magnetic pole in described multipole orientation annular magnetic；
(2) use the outer magnetic pole-outer magnetic pole formula alignment magnetic field produced by said two magnetic conductive device that described magnetic powder is orientated；
(3) by outer magnetic pole-outer magnetic pole formula alignment magnetic field or the mold rotation angle, θ equipped with described magnetic powder described in step motor control, described angle, θ, equal to the angle of a pair magnetic pole in described multipole orientation annular magnetic, then uses described outer magnetic pole-outer magnetic pole formula alignment magnetic field to be orientated described magnetic powder；
(4) continue to rotate described outer magnetic pole-outer magnetic pole formula alignment magnetic field or described mould according to the mode of step (3), and use described outer magnetic pole-outer magnetic pole formula alignment magnetic field described magnetic powder to be orientated, until completing the orientation of 360 degree；
(5) after also having included the orientation to described magnetic powder, described magnetic powder is suppressed, obtain multipole orientation annular magnetic.
Method the most according to claim 1, it is characterised in that described core rod is prepared from by permeability magnetic material；Described former and die sleeve are prepared from by non-magnet material.
Method the most according to claim 1 and 2, it is characterised in that described outer magnetic pole-outer magnetic pole formula alignment magnetic field is stationary magnetic field or the pulsed magnetic field of rule change.
Method the most according to claim 1 and 2, it is characterised in that described multipole orientation annular magnetic includes 4 poles, 8 poles, 16 poles, 24 pole orientation annular magnetics.
Method the most according to claim 4, it is characterised in that described multipole orientation annular magnetic is 8 pole orientation annular magnetics, and the angle between said two magnetic conductive device is 45 degree.
6. the device of the preparation method using any one of claim 1-5, it is characterised in that described device includes mould, two magnetic conductive device and motor, wherein:
Described mould includes that core rod, former and die sleeve, described former suit are arranged on outside described core rod, and to form the groove placing magnetic powder, described die sleeve suit is arranged on outside described former, and described die sleeve closely cooperates with described former；
Said two magnetic conductive device is arranged on outside described die sleeve, and the angle between said two magnetic conductive device is equal to the angle of a pair magnetic pole in multipole orientation annular magnetic, and described motor is connected with said two magnetic conductive device or described mould；
Also include that chuck, described chuck are fixed on the outer radius of described die sleeve.
Device the most according to claim 6, it is characterised in that described core rod, former and die sleeve are for being arranged concentrically.
8. according to the arbitrary described device of claim 6～7, it is characterised in that described core rod is prepared from by permeability magnetic material；Described former and die sleeve are prepared from by non-magnet material.
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| CN103123864B (en) * | 2013-02-26 | 2016-01-06 | 江苏东瑞磁材科技有限公司 | A kind of method and manufacturing installation thereof preparing radial permanent magnetic ring |
| CN105304263A (en) * | 2015-10-16 | 2016-02-03 | 宁波鑫丰磁业有限公司 | One-step molding halbach array permanent magnet radial ring |
| CN106057397B (en) * | 2016-07-20 | 2019-02-01 | 浙江品创知识产权服务有限公司 | Multi-pole magnet-ring |
| CN106057398B (en) * | 2016-07-20 | 2019-02-26 | 浙江品创知识产权服务有限公司 | Multi-pole magnet-ring |
| CN110165847B (en) * | 2019-06-11 | 2021-01-26 | 深圳市瑞达美磁业有限公司 | Method for producing radial anisotropic multi-pole solid magnet with different width waveforms |
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| JP4478869B2 (en) * | 2004-05-06 | 2010-06-09 | ミネベア株式会社 | Method for manufacturing anisotropic bonded magnet |
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| CN1302489C (en) * | 2001-10-31 | 2007-02-28 | 信越化学工业株式会社 | Radial anisotropic sintered magnet, its production method, and rotor and motor therewith |
| CN101103422A (en) * | 2005-12-13 | 2008-01-09 | 信越化学工业株式会社 | Process for producing radially anisotropic magnet |
| CN101256898A (en) * | 2008-03-27 | 2008-09-03 | 深圳市天盈德科技有限公司 | Method and apparatus for forming of radiation orientating round ring-shaped magnetic body |
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